• Start by preheating your oven to 350°F (175°C). Prepare a 9-inch springform pan with nonstick spray and place a circle of parchment paper on the base.

For Cake:

• In a large bowl, use an electric mixer to whisk together the eggs and sugar until the mixture lightens in color and becomes fluffy, approximately 2 minutes. Incorporate the softened butter, then add the milk and vanilla, blending to a smooth consistency.
• In a separate bowl, combine the sifted flour, baking powder, and salt. Gradually incorporate this dry mix into the wet ingredients, stirring gently until just combined, being careful to eliminate flour lumps.
• Transfer the batter into the prepared springform pan, smoothing the top. Spoon dollops of Nutella on top and use a skewer or a knife to create swirls throughout the batter for a marbled effect.
• Set the cake on the middle rack of your oven and bake for 30 to 35 minutes. Check for doneness by inserting a toothpick into the center; it should come out clean or with a few crumbs attached.
• Once done, let the cake cool in the pan on a wire rack for 15 minutes. Carefully release the springform collar and allow the cake to fully cool before slicing and serving.